As an explorer, I intentionally don't have a massive jump range. I like visiting as many systems as possible,
True but there are areas where the systems are a lot further apart, a gadget like this would be of help there.
There is the question of what this would do to fuel consumption, perhaps it could work by boosting the amount of fuel you can use in a single jump and it should probably be limited to a single unit per ship.
Wouldn't it be better if we had more oportunity to sidegrade our existing components? For example, if you wanted range, you could find a FSD that had increased one jump fuel consumption, at the cost of something else, like power draw and/or mass.
Honestly, I think equipping would be a lot more interesting if we did away with the rating system entirely, just having size class and different sidegrades, like the weapons in Beta 3.